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INDONESIA
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri
Published by Universitas Kristen Petra Surabaya
ISSN : 14112485     EISSN : 20877439     DOI : -
Core Subject : Engineering,
Industrial & Manufacturing Engineering
Jurnal Teknik Industri aims to: Promote a comprehensive approach to the application of industrial engineering in industries as well as incorporating viewpoints of different disciplines in industrial engineering. Strengthen academic exchange with other institutions. Encourage scientist, practicing engineers, and others to conduct research and other similar activities.
Arjuna Subject : -
Articles 412 Documents
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Front Matter (Cover, Editorial, Table of Content) Industri, Jurnal Teknik
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 1 (2024): June 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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Multi-Task Simultaneous Supervision: Dual Resource-Constrained Scheduling Problem in Identical Parallel Machines Considering Differences in Operator Skill Levels Rizka, Afifah; Sukoyo, Sukoyo; Akbar, Muhammad
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.119-130

Abstract

This paper focuses on developing a Multi-Task Simultaneous Supervision Dual Resource-Constrained Scheduling (MTSSDRC) system that considers differences in skill between operators, aiming to minimize makespan and balance operator workload. Workload balance is calculated using the Workload Smoothness Index (WSI). The mathematical model developed uses three techniques: Mixed-Integer Linear Programming (MILP), Mixed-Integer Quadratic Programming (MIQP), and Mixed-Integer Quadratically Constrained Programming (MIQCP). These techniques can handle scheduling cases on a small to medium scale. Results from MILP focus on minimizing makespan, with an additional constraint for calculating the WSI. MIQP focuses on workload balance so that the WSI value becomes an objective function. It also adds a constraint for the allowable makespan value. The result from MIQP shows that the WSI value is lower than in MILP, and the makespan values are equal to the MILP makespan value. Next, MIQCP aims to minimize makespan with a constraint for the allowable WSI value. The MIQCP model produces a makespan value adjusted to a WSI value close to zero. Finally, further analysis is presented regarding the influence of differences in operator skills based on the results of the three models. Based on these models, operators with better skills will be assigned more frequently than others.
A Text Mining Approach to Analyzing the Omnichannel Retail Business Performance of the KlikIndomaret App Budianto, Akhmad Ghiffary; Suryo, Arief Trisno Eko; Zulkarnain, Andry Fajar; Cahyono, Gunawan Rudi; Rusilawati, Rusilawati; Az-Zahra, Siti Fatimah
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.131-144

Abstract

The evolution of Web 2.0 technology has significantly influenced the use of Android applications, enabling users to provide feedback through reviews and star ratings. In managing omnichannel retail businesses, this user-generated content serves as a valuable source of information for performance evaluation and strategic management of both online and offline operations. Large-scale user review data is well-suited for analysis through text mining, particularly in sentiment analysis, when combined with topic and keyword filtering in the business domain. This study utilizes the RoBERTa Transformer model for the sentiment classification of user reviews. Among the 520 user reviews, 211 displayed good emotion, while 309 showed negative sentiment. By applying filtering processes to topics and keywords within the omnichannel retail business domain, the study identifies "economic value" and "delivery and CRM" as priority areas for improvement. This conclusion is drawn based on the significant disparity between positive and negative sentiments. As a result, management can formulate strategies to enhance the performance and user experience of the KlikIndomaret Android application.
Technical Economic Optimization Analysis for Cost-Effective Process of CNC Laser Machine G-Weike LC6090 Using Simplex Lattice – Centroid and Full Costing Methods Tjahyono, Rudi
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.103-118

Abstract

This research focuses on the technical economic optimization of the CNC CO2 laser machine G-Weike type LC6090 for engraving acrylic material. Because there is no ideal tabulation that serves as a guide for the operator in setting machine parameters, one of the issues in operating the machine is that the engraving process for acrylic materials is still traditionally done through estimation or approximation. Indeed, this affects process inconsistency, leading to resource waste and machine operations due to defects. Since defective process results cannot be fixed or recycled, the cost of raw materials and machining will inevitably be incurred. This study emphasizes the principle of effectiveness in optimizing the laser machine-level settings for the engraving process using the Simplex Lattice-Centroid approach to generate a tabulation of optimal settings. With a speed variable level setting of 55,556 mm/s, a power of 50%, and an interval of 0.083782, the ideal results value at processing time is 1.240184, depth is 0.054967, and roughness is 0.012728. The scan speed variable strongly correlates with optimization of depth, roughness, and processing time. The scan interval variable has a moderate correlation with depth, and the power variable has a moderate correlation with processing time and roughness. The best cost efficacy in the process was then ascertained by measuring cost-effectiveness using the Full Costing method. The cost-effective results are IDR 46,778.08 per hour or IDR 13,472,087.04 annually. Using cost-effective measurements can produce a Life Cycle Cost (LCC) of the CNC laser machine value of IDR 134,720,870.4 per 10-year service lifetime.
Enhancing Tablet Product Experience on AliExpress: A Data-Driven Analysis of Online Customer Reviews Isak, Mukhtar Adan; Laksono, Pringgo Widyo; Pujiyanto, Eko
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.171-180

Abstract

In the competitive e-commerce landscape, understanding customer experience is critical for businesses to enhance satisfaction and drive sales, particularly for tablet products. This study provides in-depth insights into customer experiences with tablet products on the AliExpress platform by analyzing 4,469 online reviews through sentiment analysis and topic modeling. The sentiment analysis reveals that while a significant portion of reviews are neutral to slightly negative, the overall sentiment is positive, indicating general satisfaction. Topic modeling uncovers key themes, with positive discussions centered around fast delivery, value for money, and children's enjoyment, while negative themes highlight issues with screen performance, customs processes, and unexpected taxes, particularly for Brazilian customers. Temporal analysis shows dynamic spikes in topics like fast delivery and cost-benefit during specific periods. These findings provide actionable guidance for businesses and manufacturers to optimize tablet quality, logistics, and marketing strategies to meet the needs and preferences of their target audience better.
Design for Manufacturing and Assembly Optimization of Home-Scale Biodigester-Composter Using VDI 2222 and Finite Element Analysis Methods Wijaya, Dewa Kusuma; Suprijono, Herwin; Santoso, Heru Agus; Kusmiyati, Kusmiyati; Muchti, Muhammad Agusdika Ridho
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.157-170

Abstract

This research focused on the Design for Manufacturing and Assembly (DFMA) optimization of home-scale biodigester-composter machines. The aims to determine feasibility from technical-economic aspects. The technique was to design the machine's mechanical process, physical, and constituent components. There are two methods conducted on this research, VDI 2222 to optimize and Finite Element Analysis (FEA) to assess the optimal quality results of the machine design based on simulation analysis. This research ended with making a physical prototype of a home-scale biodigester-composter machine using the optimal design, then validating it with a working test of the machine. The results of the VDI 2222 method show an optimal design concept through the structure of the working mechanism. All its constituent components match with the ten target specifications and the machine manufacturing cost of IDR 2,393,000, as well as the assembly chart design for each constituent component. These results are also evaluated using the FEA method. The resistance value of the frame system to maximum Von Mises Stress is obtained at 128.75 MPa with a minimum value of 6.93e-04 MPa. It is concluded to be acceptable at withstanding normal and shear stresses effectively with a relatively small displacement value of 0 to 0.47 mm. The equivalent strain value results are 3.89e-09 ul to 5.83e-04 ul and safety factor value results are 1.93 to 15 ul. It can be concluded that the frame system design concept is safe.
A Preference-Oriented Multi-Criteria Decision Model for Stunting-Prevention Food Basket Ranking using AHP-TOPSIS Yaqin, Alvin Muhammad ‘Ainul; Rosyid, Mifthahul Janna; Leksono, Vridayani Anggi; Wantira, Amanda Dwi
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.145-156

Abstract

It is necessary to give concentrated attention to the issue of stunting by implementing appropriate nutrition initiatives to prevent stunted physical and mental development. Optimal food availability is one effective strategy for preventing it. However, it often disregards preferences that guarantee pleasure, dietary diversity, and compatibility with individual tastes. In this paper, we show a two-step multi-criteria decision model. The AHP is used to figure out the criteria weights, and the TOPSIS method ranks food basket options based on how close they are to the ideal solution. The efficacy of our strategy was subsequently evaluated in Balikpapan, a prominent urban center in Indonesia grappling with the issue of stunting. The evaluation's findings were as follows: nutritional value (27%) was the most significant factor, knowledge of the food ingredients (18%), variety of foods made from the food ingredients (17%), ease of preparation, cooking, and storage (15%), cost (12%), and child preference (11%). The findings indicated that food basket 3, priced at Rp209,857 and yielding 1,854.96 kcal, consisted of rice weighing 3.63 kg, duck egg weighing 1.16 kg, milkfish weighing 0.65 kg, tuna weighing 0.06 kg, cauliflower weighing 0.17 kg, kale weighing 3.46 kg, and dragon fruit weighing 1.87 kg. In addition to nutrition and cost, this study highlights that considering preferences can enhance the appeal of food baskets.
Strategic Ambidexterity and Organizational Performance of Manufacturing Companies in Jakarta, Indonesia Mariza, Ita; Baskoro, Gembong
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.181-192

Abstract

This study identifies factors that improve competitive strategies in manufacturing companies, known as strategic ambidexterity (SA), and their impact on organizational performance to improve production systems as a source of competitive advantage. This survey study was conducted through employee perceptions of SA, by exploiting and exploring firm capacity and capability. Data were collected through a survey directly to the respondents involving 200 employees of manufacturing companies in Jakarta, Indonesia. The method used was a field survey, and the data were analyzed using Structural Equation Modeling (SEM) with Linear Structural Relations (LISREL 9.2). The findings are exploiting organizational capacity has significant effect on SA, exploring organizational capability has a significant effect on SA, and SA has a significant effect on organizational performance. The limitations of this research are it is characterized by cross-sectional and perceptual analysis. The location of all companies involved is only in Jakarta. The managerial implications are that optimal firm performance can be achieved by implementing SA through exploiting organizational capacity to maximize competitiveness in existing markets by optimizing the service quality to customer, improving processes to respond to market feedback, and understanding market needs, and exploring capability to take opportunities in new markets through product innovation, discovering and integrating new technologies, maintaining customers relationships, being flexible and adaptive to the market needs.
Risk Mitigation of Air Knocker Using Fuzzy FMEA-AHP: A Case Study Panudju, Andreas Tri; Sitorus, Helena; Marfuah, Umi; Sudarwati, Wiwik; Nurhasanah, Nunung
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.193-206

Abstract

This research is driven by the necessity for effective and high-quality maintenance systems capable of fulfilling rigorous equipment maintenance standards. The purpose of this study was to identify potential failures in an air knocker, evaluate the risk of failure through the Fuzzy FMEA approach, and optimize decision-making using the AHP method. This study was based on theories related to maintenance, Fuzzy FMEA, and AHP. The research methodologies employed comprised a literature review, data analysis, and the application of Expert Choice software to compute weights and ratings according to pertinent criteria. The results showed that the integration of Fuzzy FMEA and AHP methods was effective in identifying potential failures, evaluating risks more accurately, and prioritizing optimal corrective actions in the maintenance system. This study suggests that the integration of Fuzzy FMEA and AHP methods can improve risk management and decision-making in maintenance systems. This strategy assists organizations in mitigating the risk of failure, enhancing efficiency, and more effectively addressing process requirements. This methodology enables a more comprehensive examination of risk variables and the efficient management of uncertainties, as well as the decision-making process for assessing the risks associated with air knocker operations.
Front Matter (Cover, Editorial, Table of Content) Industri, Jurnal Teknik
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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